add launch storybook

Author: alelouet

templates/front/src/stories/README.md

@@ -6,5 +6,6 @@ Official Documentation
 [Documentation](https://storybook.js.org/docs/react/writing-stories/introduction)
 
 
-Installation
-------------
+To launch Storybook, use the following command: `yarn storybook`
+
+This command starts a local server and opens Storybook in your default web browser.